@article{oai:nagoya.repo.nii.ac.jp:00005408,
 author = {Usami, Shunsuke and Hasegawa, Hiroki and Ohsawa, Yukiharu},
 issue = {6},
 journal = {Physics of Plasmas},
 month = {Jun},
 note = {Motions of nonthermal, fast ions in an oblique shock wave are studied theoretically and numerically. After the encounter with a shock wave, some of the fast ions get to move with it. Their energies then increase once in each gyroperiod. Their momenta parallel to the magnetic field also increase. Thus, these particles eventually escape, going away ahead of the wave. However, it is theoretically predicted that under certain circumstances, owing to relativistic effects, particles cannot go faster in the direction of the shock propagation than the wave. Some particles therefore cannot escape from the wave. Accordingly, the acceleration could be repeated indefinitely. This idea is examined by means of a one-dimensional, relativistic, electromagnetic, particle simulation code with full ion and electron dynamics. The simulations demonstrate that the repeated acceleration of relativistic ions does occur. The acceleration processes were observed to continue until the end of simulation run. Also, it is shown that as the theory predicts, a higher energy particle can gain a greater amount of energy.},
 pages = {2666--2672},
 title = {Incessant acceleration of relativistic ions by an oblique shock wave},
 volume = {8},
 year = {2001}
}